Parameters

If optional and not specified,
the function will try to find an open link to the FrontBase server and if no
such link is found it will try to create one as if
fbsql_connect() was called with no arguments.

Return Values

Returns the ID generated from the previous INSERT query, or 0 if the
previous query does not generate an DEFAULT UNIQUE value.

If you need to save the value for later, be sure to call this function
immediately after the query that generates the value.